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《【5A文】曼妥斯和可乐的反应原理.pptx》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、1MentosCOKE&YoudrinkCokeIt’scoolYoueatMentosIt’sfineBut!IfyoueatMentosafterdrinkingCoke……Whythishappens?Inordertoexplainthis,therearethreethingsweneedtoknow:TheingredientsofMentosTheingredientsofCokeHenry’slawTheingredientsofMentosThemainingredientsofMentos
2、aresucrose,glucose,cornmeal,andgumarabic(formula:CH4O3S,mainingredientisarabicacid)TheingredientsofCokeThemainingredientsofCokearewater,sugar,carbonicacid,phosphoricacid,andcaffeine.Henry’slawAtaconstanttemperature,theamountofagivengasthatdissolvesinagivent
3、ypeandvolumeofliquidisdirectlyproportionaltothepartialpressureofthatgasinequilibriumwiththatliquid.在等温等压下，某种气体在溶液中的溶解度与液面上该气体的平衡压力成正比。Cokecontainsalotofcarbondioxide,inordertodissolvelargeamountsofCO2intoasmallbottleofliquid,CO2gaswillbecompressedbyhighpres
4、sure.AccordingtotheLeChatelier’sprinciple,whenpressureincreases,moreCO2willdissolveinwater.TheprincipleofreactionTherefore,whenpressurebecomesveryhigh,largeamountsofCO2willdissolveinwatercompletelytoformasuper-saturatedsolution,thissolutionbecomesveryunstab
5、lewhenweopentheCokebottle.(AccordingtotheHenry’slaw,thepressureinthebottledecreaseswhenweopenit,itmeanstheamountofgasthatcandissolveinaliquidalsodecreases,therefore,someCO2gaswillescapefromtheliquid.)THeprincipleofreactionTheprincipleofreactionInterference:
6、Becausetherearemanycoremealgrainsinmentos,thesurfaceofmentosisveryrough,soitcanfunctionasaperfectcatalyst.Inotherwords,ithasinterferencefunction.Rememberthatthesolutionisatsupersaturatestateanditisextremelyunstable,ifainterferencepointoccursinthesolution,th
7、ebalancewillbebrokenandlotsofCO2gaswillcomeoutofthesolution.(H2CO3----H2O+CO2)Thesolutionwilleventuallyreachitsequilibriumpoint.Thiswholeprocessresultsinthephenomenonwesawinthevedio.TheprincipleofreactionThanksforwatching!
